Revert "Rewrite double.parse."

tests/corelib/string_trim2_test.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 import "package:expect/expect.dart";
 
 const WHITESPACE = const [
-  0x09,
-  0x0A,
-  0x0B,
-  0x0C,
-  0x0D,
+  9,
+  10,
+  11,
+  12,
+  13,
   0x20,
   0x85,
   0xA0,
   0x1680,
   0x180E,
   0x2000,
   0x2001,
   0x2002,
   0x2003,
   0x2004,
@@ skipping 14 matching lines @@
 main() {
   for (var ws in WHITESPACE) {
     Expect.equals("", new String.fromCharCode(ws).trim());
   }
   Expect.equals("", new String.fromCharCodes(WHITESPACE).trim());
   for (var ws in WHITESPACE) {
     var c = new String.fromCharCode(ws);
     Expect.equals("a", ("a" + c).trim());
     Expect.equals("a", (c + "a").trim());
     Expect.equals("a", (c + c + "a" + c + c).trim());
-    Expect.equals("a" + c + "a", (c + c + "a" + c + "a" + c + c).trim());
   }
 }